Purpose: The aims of the research are twofold: (a) Exploring whether football club stocks can be considered an asset class of their own. (b) Investigating whether football stocks enable well-diversified investors to achieve more efficient risk-return combinations.
Research methods: Using efficient frontier optimization, a base portfolio, with standard stocks and bonds, and a corresponding enhanced portfolio, which includes football stocks in the investment opportunity set, are defined. This procedure is applied to four portfolio composition rules. Pairwise comparisons of portfolio Sharpe ratios include a test for statistical significance.
Findings: The results indicate a low correlation of football stocks and standard stocks; thus, football stocks could be considered an asset class of their own. Nevertheless, the addition of football stocks to a well-diversified portfolio does not improve its risk-return efficiency because the weak performance of football stocks eliminates their advantage of low correlation.
Originality and value: To the best of our knowledge, this is the first study to analyse the risk-return efficiency of football stocks from the perspective of a pure financial investor, i.e., an investor in football stocks who does not earn side benefits, such as strategic investors or fan investors.
Research implications: This study contributes to the evidence that investments in football are different from “ordinary” investments and need further research, particularly into market participants and their investment motives.
Practical implications: Football stocks are not attractive to pure financial investors. Thus, football clubs need to know more about which side benefits are appreciated by which kind of investor.